Granted Patent
Utility
US 5,016,501 · App. 07/226,366
Automatic shaft lock
Inventor:
Michael Holzer
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Jul 29, 1988
Inventor
Michael Holzer
Assignee (at issue)
Skil Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.